What is "darkling beetle"

n. sluggish hard-bodied black terrestrial weevil whose larvae feed on e.g. decaying plant material or grain [syn: darkling groung beetle, tenebrionid]

Darkling beetle is the common name of the large family of beetles, Tenebrionidae. The number of species in the Tenebrionidae is estimated at more than 20,000 and the family is cosmopolitan. Humans spread some species sufficiently that they became cosmopolitan. Examples include Tribolium castaneum.